Deck 7: Computer Networks

Question 1

In general,Wi-Fi is designed for medium-range data transfers-typically between 100 and 300 feet both indoors and outdoors.

Answer 1

False

Question 2

Transferring data from a client PC to a server is referred to as downloading.

Answer 2

False

Question 3

A personal area network (PAN)is a network of personal devices for one individual,such as his or her portable computer,mobile phone,and printer.

Answer 3

True

Question 4

Client-server networks are frequently referred to as peer-to-peer networks.

Question 5

PC conferencing is the use of networking technology to conduct real-time,face-to-face meetings between individuals physically located in different places.

Question 6

TCP/IP is the protocol used for transferring data over the Internet.

Question 7

One of the early Ethernet protocols (called 10BASE-T)supports transmission rates of 10 Mbps.

Question 8

When parallel transmission is used,the message is sent at least one byte at one time with each bit in the byte taking a separate path.

Question 9

The accompanying figure shows a coaxial cable,in which pairs of copper wires are insulated with a plastic coating and twisted together.

Question 10

GPS receivers are commonly used by individuals to determine their geographic location while hiking and to obtain driving directions while traveling.

Question 11

Mobile phones are also called wireless phones.

Question 12

Collaborative computing takes place via both private company networks and the Internet.

Question 13

Because geosynchronous satellites are so close above the surface of the earth,there is no delay while signals travel from earth,to the satellite,and back to earth again.

Question 14

The conventional phone system uses digital signals.

Question 15

In a bus network,all the networked devices connect to a central device (such as a server or a switch)through which all network transmissions are sent.

Question 16

The most common type of mobile phone is the satellite phone.

Question 17

A network,in general,is a connected system of objects or people.

Question 18

Physicians can use telemedicine to perform remote diagnosis of patients.

Question 19

Communications satellites are space-based devices launched into orbit around the earth to receive and transmit microwave signals to and from earth.

Question 20

Some monitoring systems in use today use the RFID tags and RFID readers to monitor the status of objects (such as shipping boxes,livestock,or expensive equipment)to which the RFID tags are attached.

Question 21

Because there may be many Bluetooth devices within range,up to 10 individual Bluetooth networks (called piconets)can be in place within the same physical area at one time.

Question 22

Electronic medical monitors are available that take the vital signs of an individual (such as weight,blood-sugar readings,or blood pressure)or prompt individuals to answer questions.

Question 23

With a(n)partial mesh topology,some devices are connected to all other devices,but some are connected only to those devices with which they exchange the most data.

Question 24

A(n)computer network is a collection of computers and other hardware devices connected together so that network users can share hardware,software,and data,as well as electronically communicate with each other.

Question 25

With telesurgery,at least one of the surgeons performs the operation by controlling the robot remotely,such as over the Internet or another network.

Question 26

The RedStar system built into many GM cars uses GPS to locate vehicles when the occupant activates the service or when sensors indicate that the car was involved in an accident.

Question 27

__________ technology is commonly used to monitor the status of objects,such as shipping boxes,livestock,or expensive equipment to which these types of tags are attached.

A)IrDA
B)cellular
C)RFID
D)Bluetooth

Question 28

Support for TCP/IP is built into virtually all operating systems,and TCP addresses are commonly used to identify the various computers and devices on networks such as LANs.

Question 29

\


-The accompanying figure illustrates a(n)ring network.

Question 30

An emerging type of mobile phone is the cellular/satellite ____ phone that can be used with cellular service when it is available and then switches to satellite service when cellular service is not available.

A)dual-mode
B)dual-core
C)duplex
D)digital

Question 31

The ____ network consists of 24 Department of Defense satellites that are used for location and navigation purposes.

A)location positioning system (LPS)
B)satellite positioning system (SPS)
C)cellular phone
D)global positioning system (GPS)

Question 32

With a(n)peer-to-peer (P2P)network,a central server is not used.

Question 33

A(n)star network uses a number of different connections between network devices so that data can take any of several possible paths from source to destination.

Question 34

Most networking media send data using analog signals.

Question 35

TCP/IP uses a technique called packet switching to transmit data over the Internet.

Question 36

One type of mobile phone that is not commonly used is the ____.

A)roaming phone
B)landline phone
C)satellite phone
D)analog phone

Question 37

A global positioning system (GPS)consists of ____ and a group of GPS satellites.

A)GPS transmitters
B)Wi-Fi receivers
C)GPS amplifiers
D)GPS receivers

Question 38

The most common type of mobile phone is the cellular (cell)phone.

Question 39

Wi-Fi is a wireless standard that is designed for very short-range (10 meters,approximately 33 feet,or less)connections.

Question 40

A(n)small area network (SAN)is a network that covers a relatively small geographical area,such as a home,office building,or school.

Question 41

In ____ transmission,data can move in both directions at the same time,such as with a telephone.

A)full-duplex
B)full-simplex
C)half-simplex
D)half-duplex

Question 42

The accompanying figure shows a ____ network.

A)star
B)ring
C)bus
D)mesh

Question 43

____ refers to the amount of data that can be transferred (such as over a certain type of networking medium)in a given time period.

A)Bandwidth
B)Bluetooth
C)Modulation
D)Throughband

Question 44

____ is the use of networking technology to provide medical information and services.

A)Telecommuting
B)Remote medicine
C)Telemedicine
D)Remote health

Question 45

____ are earth-based stations that can transmit microwave signals directly to each other over distances of up to about 30 miles.

A)Satellite stations
B)RFID stations
C)Wi-Fi stations
D)Microwave stations

Question 46

Microsoft Office markup tools and specialized ____ are used in conjunction with networking technology to allow multiple individuals to edit and make comments in a document without destroying the original content.

A)collaboration software
B)online software
C)job software
D)OCR software

Question 47

With ____,data is sent one bit at a time,one after the other along a single path.

A)serial transmission
B)parallel transmission
C)digital transmission
D)wireless transmission

Question 48

The ____ allows individuals to "placeshift" multimedia content from their home TVs and DVRs to their portable computer or mobile device.

A)Singbox
B)Slingbox
C)Singmedia
D)Shiftmedia

Question 49

____ transmission is relatively uncommon in data transmissions since most devices that are mainly one-directional,such as a printer,can still transmit error messages and other data back to the computer.

A)Half-duplex
B)Simplex
C)Full-duplex
D)Asynchronous

Question 50

A ____ is a network that covers a relatively small geographical area,such as a home,office building,or school.

A)small area network (SAN)
B)metropolitan area network (MAN)
C)local area network (LAN)
D)personal area network (PAN)

Question 51

In a ____ network,there are a number of different connections between the devices on the network so that data can take any of several possible paths from source to destination.

A)bus
B)star
C)ring
D)mesh

Question 52

The accompanying figure displays a ____.

A)coaxial cable
B)twisted pair cable
C)fiber-optic cable
D)single-wire cable

Question 53

Some wireless ____ are created by cities or large organizations to provide free or low-cost Internet access to residents of a particular area.

A)WANs
B)MANs
C)LANs
D)PANs

Question 54

Monitoring systems may also use ____,which are devices that respond to a stimulus (such as heat,light,or pressure)and generate an electrical signal that can be measured or interpreted.

A)transmitters
B)interpreters
C)IAs
D)sensors

Question 55

____ was originally developed to carry a large number of high-speed video transmissions at one time,such as to deliver cable TV service.

A)Twisted-pair cable
B)Fiber-optic cable
C)Coaxial cable
D)Single-wire cable

Question 56

____ transmissions are used with cell phones and are sent and received via cellular (cell)towers.

A)PM radio
B)Wi-Fi radio
C)Cellular radio
D)Satellite radio

Question 57

The technique used for data sent over the Internet is ____.

A)docket switching
B)wideband switching
C)packet switching
D)data switching

Question 58

In ____ transmission,data can travel in either direction,but only in one direction at a time.

A)duplex
B)simplex
C)half-simplex
D)half-duplex

Question 59

In ____ transmission,data is sent at the same time as other related data to support certain types of real-time applications that require the different types of data to be delivered at the proper speed for that application.

A)synchronous
B)isochronous
C)asynchronous
D)endrosynchronous

Question 60

____ is the use of networking technology to conduct real-time,face-to-face meetings between individuals physically located in different places.

A)Online conferencing
B)Videoconferencing
C)Phone conferencing
D)VoIP conferencing

Question 61

____________________ phones are most often used by individuals-such as soldiers,journalists,wilderness guides,and researchers-traveling in remote areas where continuous cellular service might not be available.

Question 62

Case 7-1
Robert is a medical writer for a pharmaceutical company.The company allows Robert to work from home.
Robert's job is a(n)____ job.

A)telemarketing
B)telecommuting
C)videoconferencing
D)e-working

Question 63

____ is the fastest and most current Wi-Fi standard.

A)802.11a
B)802.11g
C)802.11n
D)802.11x

Question 64

The original first-generation cell phones were ____ and designed for voice data only.

A)digital
B)discrete
C)analog
D)magnetic

Question 65

A ____ transmits all data received to all network devices connected to it,regardless of which device the data is being sent to.

A)bridge
B)router
C)gateway
D)hub

Question 66

____________________ networking devices (such as digital media receivers)can be used to share and deliver digital content throughout the home via a multimedia network.

Question 67

Mobile phones are phones that use a ____________________ network for communications instead of being connected to the regular telephone network via a conventional telephone jack.

Question 68

____ is a wireless standard that is designed for very short-range (10 meters,approximately 33 feet,or less)connections.

A)IrDA
B)xMax
C)Wi-Fi
D)Bluetooth

Question 69

Similar to Wi-Fi,____ is designed to provide Internet access to fixed locations (sometimes called hotzones),but the coverage is significantly larger.

A)WinMax
B)EMax
C)WiMAX
D)802.11b

Question 70

A standard that is designed to connect peripheral devices,similar to Bluetooth,but that transfers data more quickly is ____.

A)WiMAX
B)xMax
C)Mobile-Fi
D)wireless USB

Question 71

The term communications,when used in a computer context,refers to ____________________.

Question 72

Case 7-2
Gabrielle is the network administrator at a medium-sized company.One of her responsibilities is to purchase network devices to maintain the company network.
Gabrielle realizes that to improve network performance,she needs to buy and install a ____,which identifies the device on the network for which the data is intended and sends the data to that device only.

A)switch
B)node
C)bus
D)bridge

Question 73

Technically,to be called a ____,a device must convert digital signals (such as those used by a computer)to modulated analog signals (such as those used by conventional telephone lines)and vice versa.

A)hub
B)modem
C)switch
D)router

Question 74

Case 7-2
Gabrielle is the network administrator at a medium-sized company.One of her responsibilities is to purchase network devices to maintain the company network.
Gabrielle would like to purchase a new ____,which would be used to connect the company's LAN and the Internet.

A)hub
B)USB port
C)router
D)bridge

Question 75

____ is typically used with LANs that have a star topology and can be used in conjunction with twisted-pair,coaxial,or fiber-optic cabling.

A)Ethernet
B)Token Ring
C)Wi-Fi
D)80xx2.11

Question 76

Case 7-1
Robert is a medical writer for a pharmaceutical company.The company allows Robert to work from home.
Every day,Robert uses ____ to have a real-time,face-to-face meeting with his boss.

A)intranets
B)telemarketing
C)virtual networks
D)videoconferencing

Question 77

Case 7-2
Gabrielle is the network administrator at a medium-sized company.One of her responsibilities is to purchase network devices to maintain the company network.
Gabrielle is planning to connect selected devices to the network wirelessly with a wireless ____.

A)hotspot
B)access point
C)hub
D)data point

Question 78

A network adapter,also called a ____ when it is in the form of an expansion card,is used to connect a computer to a network.

A)network interface card (NIC)
B)powerline card
C)data communications card (DCC)
D)USB

Question 79

The ____________________ is a satellite-based location and navigation system.

Question 80

____ satellites travel at a speed and direction that keeps pace with the earth's rotation,so they appear (from earth)to remain stationary over a given spot.

A)Microwave
B)Geosynchronous
C)Isochronous
D)Full-duplex transmission